Guineo-Congolian region

Some parts of the forest are dominated by a single species, typically a member of the Fabaceae, such as Brachystegia laurentii, Cynometra alexandri, Gilbertiodendron dewevrei, Julbernardia seretii or Michelsonia microphylla, which form extensive monodominant stands.

[2] In places in the Ituri Rainforest of northeastern Democratic Republic of the Congo, G. dewevrei forms 90% of the tree species present in the canopy.

However, there is a transition zone where the two floras, each in an impoverished form, intermingle or occur in a mosaic pattern, influenced by climatic factors and soil types.

Hygrophilous coastal evergreen forests occur in moist locations between Sierra Leone and Gabon in an intermittent coastal strip; these forests are often rich in legume family species which may regenerate freely and form pure stands.

Mixed moist semi-evergreen forests occur extensively, especially in the Congo Basin, in somewhat drier locations.